Long Description:Gravenhurst's Post Office was built as a one storey building in 1926. A second storey and clock tower were added in 1931. It was designated a heritage property in 2015.

Further additions to the building were made in 1934 and 1951 and the retail lobby was upgraded in the 2000s. The tower is topped by a metal cupola. All four faces of the clock were restored and returned to functioning in 2015.